I too felt taken advantage of by their auto-subscription requirement. I was given a gift certificate from my brother- in order to redeem you need to provide a credit card and agree to sign up for a subscription that automatically renews.
Their website doesn't allow you to see the balance on the account so there's not way to avoid being charged. They also never send receipts for the bills- it seems clear they hope people don't notice the charges for a few months.
I've tried to contact Pley via e-mail and phone several times but they're unwilling to respond.